Thoughts on mainsheet traveler V’s Double blocked mainsheet?

bilbobaggins

Member
74
5
There's one well-known ocean racer who's used a twin mainsheet system....

44476269664_af6edd6d5b_b.jpg


Jean-Luc Van Den Heed.... who sailed his MatMut to a 'win' in the last Golden Globe Race. That was, for those who've forgotten already, a single-handed RTW race in often serious weather and seas. There were other competitors who had similar setups - you'll need to ask yon Don Macintyre, a fellow 'Strine.

 
G

Guest

Guest
There's one well-known ocean racer who's used a twin mainsheet system....

44476269664_af6edd6d5b_b.jpg


Jean-Luc Van Den Heed.... who sailed his MatMut to a 'win' in the last Golden Globe Race. That was, for those who've forgotten already, a single-handed RTW race in often serious weather and seas. There were other competitors who had similar setups - you'll need to ask yon Don Macintyre, a fellow 'Strine.
Different strokes, if its set and forget then why not; do what you like but there is no way youll be competitive in a short race with that setup.

 

DELETED

Anarchist
641
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So after much messing about and thinking and pricing replacement track and car etc to replace current setup. I’ve decided im doing the install and setup for the Double blocked padeyed setup. So that when the existing traveller car and rail fail i’ll be ready to have the walkthrough cockpit setup. Thanks again for all the interesting input in this thread. 
See you out there. 

 
A

Amati

Guest
So after much messing about and thinking and pricing replacement track and car etc to replace current setup. I’ve decided im doing the install and setup for the Double blocked padeyed setup. So that when the existing traveller car and rail fail i’ll be ready to have the walkthrough cockpit setup. Thanks again for all the interesting input in this thread. 
See you out there. 
How much strength does that traveller add to the cockpit? Or the aft part of the hull?  Will you need to add some deck/hull reinforcement if you don’t have the track there?  Thinking about bending forces from backstay, runners etc.

 

SailingTips.Ca

Feigns Knowledge
835
377
Victoria, BC
This would be a nightmare in a heavy air gybe.  Two set of ropes that act as deck sweepers and grab every cleat and winch on the way over.
Reminds me of an unfortunate heavy air gybe accident on a Farr 40 about 10 years ago.

One of my buddies lost his balance and happened to step into the middle of the mainsheet rats-nest that very briefly gathered on the deck mid-gybe. As the mainsheet tensioned on the new gybe, one of the coils flew up his leg, constricted just above his knee, and promptly hoisted him into the air, upside down, hanging by the knee, with the full power of the mainsail tightening the mainsheet tourniquet around his leg.   

We promptly gybed back, literally dropping him on his head.

I think he's still physically and emotionally scarred from that incident. 

If that happened singlehanded the only solution would be to start cutting - hopefully there is a knife very close by!

 

DELETED

Anarchist
641
316
Reminds me of an unfortunate heavy air gybe accident on a Farr 40 about 10 years ago.

One of my buddies lost his balance and happened to step into the middle of the mainsheet rats-nest that very briefly gathered on the deck mid-gybe. As the mainsheet tensioned on the new gybe, one of the coils flew up his leg, constricted just above his knee, and promptly hoisted him into the air, upside down, hanging by the knee, with the full power of the mainsail tightening the mainsheet tourniquet around his leg.   

We promptly gybed back, literally dropping him on his head.

I think he's still physically and emotionally scarred from that incident. 

If that happened singlehanded the only solution would be to start cutting - hopefully there is a knife very close by!
The key difference being, regardless of point of sail both blocked mainsheets in the “A” remain tight. Therefore there is no slack in the mainsheets and it also prevents full beam accidental crash jibs. Sorry to hear about your buddy. 

How much strength does that traveller add to the cockpit? Or the aft part of the hull?  Will you need to add some deck/hull reinforcement if you don’t have the track there?  Thinking about bending forces from backstay, runners etc.
Indeed a good point. In this particular boat the centre section of the track mount is seperate so it isnt a Key reinforcement point. But indeed removal of it will be rebraced under(as iam wary of change).The hiking bars and deck mounted track beam sections will be used as the new setups mounting points.
That said, i have plans to reinforce under the cockpit area to aid the A move/extension of the fuel carry capacity under it also. Right now the entire cockpit sole area is supported by the full length horizontal hull and deck reinforcement, and 2aluminium tube legs under the companionway entrance. Strong but light for offshore racing. 

 
A

Amati

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The key difference being, regardless of point of sail both blocked mainsheets in the “A” remain tight. Therefore there is no slack in the mainsheets and it also prevents full beam accidental crash jibs. Sorry to hear about your buddy. 

Indeed a good point. In this particular boat the centre section of the track mount is seperate so it isnt a Key reinforcement point. But indeed removal of it will be rebraced under(as iam wary of change).The hiking bars and deck mounted track beam sections will be used as the new setups mounting points.
That said, i have plans to reinforce under the cockpit area to aid the A move/extension of the fuel carry capacity under it also. Right now the entire cockpit sole area is supported by the full length horizontal hull and deck reinforcement, and 2aluminium tube legs under the companionway entrance. Strong but light for offshore racing. 
Was the traveller working at all against any longitudinal cockpit wall athwartship buckling?

fwiw, I had a system like the inverted v, and depending on how you do it, it can be a deep rope floor.  Messed around between 8:1 to 12:1.  Loved the feel of 12:1, but that should have been a fine-  the bitter ends were tied off at the inside on each side, with a continuous line going between.  Required some though to use, but it didn’t run out of line like separate lines.  I would recommend a 2:1 or 4:1 for the real light stuff that doesn’t interact with the rest.  Use the rest as a cascade, but That winds up crossing itself a lot., as well as a lot of cleats.  If you’re going to do that make sure you have different colors that don’t mystify when the going gets sporty.  I thought a triple cascade would be cool, but I never got around to that.  Fiddles worked the best- the normal 3 blocks in a line never ran very smoothly.

 
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DELETED

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641
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Was the traveller working at all against any longitudinal cockpit wall athwartship buckling?

fwiw, I had a system like the inverted v, and depending on how you do it, it can be a deep rope floor.  Messed around between 8:1 to 12:1.  Loved the feel of 12:1, but that should have been a fine-  the bitter ends were tied off at the inside on each side, with a continuous line going between.  Required some though to use, but it didn’t run out of line like separate lines.  I would recommend a 2:1 or 4:1 for the real light stuff that doesn’t interact with the rest.  Use the rest as a cascade, but That winds up crossing itself a lot., as well as a lot of cleats.  If you’re going to do that make sure you have different colors that don’t mystify when the going gets sporty.  I thought a triple cascade would be cool, but I never got around to that.  Fiddles worked the best- the normal 3 blocks in a line never ran very smoothly.
The internal structure is braced as is, tho i may beef that up a bit once removal of the track. But according to the drawings it isnt a structural necessity and it isnt installed heavily or triangulated. 
 The setup i intend is the same as in the above video clips. Which is essentially two seperate Double blocked and cam cleated (4:1i think) one port to boom and one starboard to boom.  
Your boat sure is a good looking sled.

 
A

Amati

Guest
The internal structure is braced as is, tho i may beef that up a bit once removal of the track. But according to the drawings it isnt a structural necessity and it isnt installed heavily or triangulated. 
 The setup i intend is the same as in the above video clips. Which is essentially two seperate Double blocked and cam cleated (4:1i think) one port to boom and one starboard to boom.  
Your boat sure is a good looking sled.
Thanks- she’s a sweety.  I’m not sure 4:1 will be enough- you can arrange it so it becomes an 8:1, or add a 2:1 cascade to that for heavy weather 16:1.  We have a ~500%+ sq ft main.

 
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carcrash

Super Anarchist
2,046
498
Cabrillo Beach YC
Sorry, this photo does not really show it, but perhaps enough.

The winch in the foreground, with the green sheet, is the starboard mainsheet. The sheet runs forward to a ring at the chainplates, then to a ring at the gooseneck, then aft along the boom to a ring at the end of the boom, and then down to the Colligo soft pad eye just forward of the winch.

Since then, I stopped using those pad eyes most of the time, and usually end the mainsheet on a car on the toe rail track.

The boomvang is only used to hold the boom up. Its the topping lift. Positioning of the boom is done using the two main sheets, most of the time. I might re-install the boom vang tackle, but so far (two years) I have never needed it.

You can also see the jib sheet, and using the lazy jib sheet as barber hauler, so no inboard track needed.

IMG_6377.jpeg

 
A

Amati

Guest
Reminds me of an unfortunate heavy air gybe accident on a Farr 40 about 10 years ago.

One of my buddies lost his balance and happened to step into the middle of the mainsheet rats-nest that very briefly gathered on the deck mid-gybe. As the mainsheet tensioned on the new gybe, one of the coils flew up his leg, constricted just above his knee, and promptly hoisted him into the air, upside down, hanging by the knee, with the full power of the mainsail tightening the mainsheet tourniquet around his leg.   

We promptly gybed back, literally dropping him on his head.

I think he's still physically and emotionally scarred from that incident. 

If that happened singlehanded the only solution would be to start cutting - hopefully there is a knife very close by!
One thing I do that gets rid of rope in the cockpit from the main sheet system is what I guess you could call a pennant that goes from the traveller cars connector to the bottom blocks, about 2’- 3’, which on a 10:1 can save quit a bit of line.  The drawback is that I use a cam cleat on the bottom block, and getting the thing cleated can be awkward, because it’s it’s pretty high.  Uncleating is easy though, sometimes too easy :lol: , but with the full width traveller I don’t need to let the boom out much. Or vice versa.  One of the blessings of 22.5 degree swept spreaders.  6’ of thick spectra (for the pennant) doesn’t cost much, and the last one I just replaced was 8 years old or so, no sheathing, held in place by a square knot, of all things. I whipped the ends to the main loop.  The working strength of that spectra was 150% of the weight of the boat!

 
have had both options on my parents yacht. the only time that the double mainsheet worked was in a drifter and there was a lot of sloppy side chop happening. you could hold the boom in a set position. any other time 1-30 knots.. the track and single mainsheet was better. just don't .

 

Jari

Member
183
8
SF bay
Esse 750 mainsheet is an interesting example/variation  eliminating traveler as well. Don't now if possible to apply  to higher loads .

 
170.jpg


 

European Bloke

Super Anarchist
3,407
829
Esse 750 mainsheet is an interesting example/variation  eliminating traveler as well. Don't now if possible to apply  to higher loads .

 
That's basically a dinghy system. It doesn't really substitute for a traveler, it's a way of centering the boom without massively tightening the leech if you don't want to.

I'd see it as the manufacturer saving money, their marketing guy will probably tell you that they're saving weight...

 


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